Envelope opening apparatus



FIG. 1 is a front, top, and left side perspective view of an envelope opening apparatus showing the new design;

FIG. 2 is a back, top, and right side perspective view thereof;

FIG. 3 is a front, bottom, and right side perspective view thereof;

FIG. 4 is a left side elevation thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a front elevation view thereof; and,

FIG. 7 is a top plan view thereof.

The elements seen in broken lines are not part of the claimed design. 

The ornamental design for an envelope opening apparatus, as shown and described. 